A wiring module includes multiple bus bars, a resin protector that has one or more holding portions that hold the bus bars and is provided with a tolerance absorbing portion that absorbs tolerance in the arrangement direction of power storage elements, and a cover that is attached to the resin protector and holds all of the holding portions. The resin protector is provided with a locking portion that locks the cover, the locking portion projecting in a direction identical to the projecting direction of electrode terminals and extending along the arrangement direction of the power storage elements. The cover is provided with a lock-receiving portion that is locked to the locking portion. The locking portion and the lock-receiving portion are locked in a manner of enabling relative movement along the arrangement direction of the power storage elements at an edge portion of the cover that extends in the arrangement direction of the power storage elements.